Answer:
Menhir = Guano (Menhir)
1959–64. Part of an ambitious series of process- and time-based paintings, Reigl's Guano (Menhir) confronts the viewer with an imposing and ambiguous mound centrally positioned against a dark backdrop.
Dolmens = Jim Ricks
Jim RicksThe Poulnabrone Bouncy Dolmen by Jim Ricks is a monumental inflatable sculpture designed for members of the public, of all ages, to interact with
Cromlech = Jonathan Alibone
-he creates mysterious figurative paintings and drawings with a photojournalistic quality. Jonathan's suggestive and stimulating visuals deprive the viewer of contextual information so that they must fill in the blanks
